Improved machine for making needles for sewing-machines



'din-'item1 Stam ,atea/tV (attivi.

GEORGE KARRMANN, OF AN SONIA, ASSIGNOR T() HIMSELF AND CHARLES Letters .Patent No. 96,011, dated October 19, 1869.

. IMPROVE!) MACHINE FOR MAKING NEEDLES FOR SEWING-MACHINES.

The Schedule referred to in these Letters Patent and making part of the same.

To'all whom 'it may concern:

Be it known that I, GEORGE KARRMANN, of Ansonia, in `the county oi' New Haven, and State ot' Connecticut, have invented and made a new and use; ful Improvement in Machinery for Making Needles; and I do hereby declare the following to bea fnll,' clear, and exact description ofthe said invention, reterence being had to the annexed drawing, making part of this specification, wherein- Figure 1 is a plan of the machine.

v Figure 2 is a cross-section of the same, atthe line -Figure 3 represents the needle., with its hooked point in the form produced in this machine, the same being inenlarged size.

Similar marks of reference denote the saine parts.

The object of this machine is to prodiue needles with hooked points, such as are employed in sewing boots and shoes by machinery, crochet-work, Sw.

To produce the most perfect hook, it is necessary` that the throat of the hook, 'overl which the cord or thread lies, shall be a semicircular groove, free from roughness, in order that the thread may not be injured by being drawn by said hook, or while sliding through the same.

I accomplish this by clamping the needle-blank to a turn-table, and employ a revolving tool, 'that is brought up to an adjustable stop, and acts to cut away the metal to form the throat ofthe hook, while, the blank is revolved with the turn-table, about au axis, which coincides with the centre of the semicircular groove forming the bottom of the throat of the needle.

The surplus metal at the sides and poin`t of the needie-blank is removed by cutters that act separately from the said throat-tool.

In the drawing- -a is a table or bed, upon which is mounted the turntable b, that is fitted with teeth around its periphery, so that it can be given'a halt` rotation, or nearly so, by the segmental gear c and lever d.

This gear c is on a fulcrum-st-ud or gudgeon, 2, and a sector, c', with a cord or chain over the pulley 3, to a spring, 4, 01 weight, is employed to return the parts to a normal position, and hold them.

Between the turn-table b and its base, on the bed a, stops are applied to the respective parts, so that theturn-table can only receive the proper amount of rotation, which, with most characters of hooked needles, will be about one-half a revolution.

Upon this turn-table b is the needle-holder, formed of a standard, b', upon the top of which is the clip e, that comes over the needle Ii, and on the side of b is a clamping-plate, y, that serves as a. support for the needle-blank, and as a clamp to hold the needle iirmly against the side of the standard b, and the under side intersects and crosses the vertical axis of the turn-` table b, and this point of intersection forms the centre, around which the grooveat the bottom ofthe hook is formed. e

The frame l is mounted on the standard m, a-nd is actuated by the strap or cord n,'and treadle n', and returned or lifted by the spring or weight o, acting upon a cord over the sector The frame Z carries a slide, l), that is adjustable in 1 and on this slide p are the bearings for the sha-ft q, driven by competent power; and q' isa wheel on the shaft q, taking the gears 13 and 14 ot the shafts yr S, upon the ends of which are the cutter-wheels r and s.

The boxes or bearings of these shafts maybe adjustable.. v

The cutter 'rf is of a V- shape, so as to cut across the end of thc needle, and leave the same with a chisel-shaped or double-inclined point, to he afterwards finished by hand, upon a wheel, or otherwise.

The cutter s double, and is operative in cutting away the metal at the sides ofthe hook, leavingr a rib that is afterward under-cut, to prodncesaid hook.

A screw-stop, 5, on the turn-table b, regulates the dista-nce that this cutter s penetrates the side oi thc. nccdlc.

After the cutters lr' s' have acted on the blank, and been raised up, the tool t is brought into action.

This tool t is mounted upon an arbor, n, in a sliding head-block, n', and t1 is a pulley, by which to apply power in rotating the tool t.

The lever c is connected to the sliding head-block u at 9, and a link, r', connects, from the end ol' the lever c, to the bed a.. l

A spring or weight,at 10, is employed to draw back the slide Iu and tool, and a stop, 11, and adjustable screw, 12, regulate the point to which thc tool can be projected, so as to come up properly to the needle-l blank.

'Aiter the blank has been partially iorrned by the cutters o" s', the sliding head-block u. and tool t are moved along by the lever r, and then the turn-table and needle-blank are given a gradual movement,while the tool t is cutting; and the shape of this tool tis such as to form the necessary groove inside the hook, and cut out and shape the metal at the throat or opening of the hook, as seen in fig. 3.

By this construction of machine, the parts can' be adjusted, so as to form a hook upon the needle-blank iu the most perfect manner, and there will be but little finishing to be done by hand.

What I claim, -and desire to secure ent, is

1. The combination of a clamp or blank-holder with the tools fr s', arranged in respect to each other and to by vLetters Patthe need1e-blank, substantially as shown and described, and for the purposes set forth.

2. The combination of the tools 0" s and twith the rotary clamp b, all arranged and operating subst-antially in the manner and for the purposes set forth.

In witness whereof', I have hereunto set my signature, this 4th day of May, A. D. 1869.

' GEORGE KARRMANN.

\Vitnesses:

SYLVESTER BARBOUR, CHAs. H. PINE. 

